Infrared Waves
Infrared Waves
As we know that IR is a type of electromagnetic radiation, a continuum of frequencies produced when atoms absorb and then release energy. Together, these types of radiation make up the electromagnetic spectrum. British astronomer William Herschel discovered infrared light in 1800, according to NASA. Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometers, and extending conventionally to 300 micrometers.
Most encyclopedias and physics books credit the great British astronomer, Sir William Herschel, with the discovery of infrared radiation in 1800. These are the electromagnetic waves of frequency range 3x 10l Hz to 4 x 10 Hz.
Uses:
Infrared waves are used
(i) in physical therapy, i.e., to treat muscular strain.
(ii) to provide electrical energy to satellite by using solar cells
(iii) for producing dehydrated fruits
(iv) for taking photographs during the conditions of fog, smoke etc.
(v) in green houses to keep the plants warm
(vi) in revealing the secret writings on the ancient walls.
(vii) in solar water heaters and cookers
(viii) in weather forecasting through infra red photography
What are infrared sensors used for? | |||
| Right Option : A | |||
| View Explanation | |||
Infrared waves are also called ______________________ . | |||
| Right Option : B | |||
| View Explanation | |||
What is full-form IR? | |||
| Right Option : A | |||
| View Explanation | |||
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